The Blackdog Beef Marrow Bone Dog Treat is a delicious treat for your furry friend. Large in size, this beef marrow bone is most suited for medium to large dogs (15kg plus) and is guaranteed to keep them entertained. The Blackdog Beef Marrow Bone Dog Treat is a natural beef marrow bone filled with beef filling which is suitable for even the strongest of chewers and is guaranteed to keep your dog occupied. With a rich source of protein and delicious packed bone marrow, marrow bones are a healthier natural alternative to high fat, heavily processed treats.